A tipster — tipsy? — shares this information about StumbleUpon founder and The 250 member in good standing Garrett Camp: "If you meet Camp, get his business card. Get several, if you can." Whatever for? "The cards are prized in certain SoMa circles, but not for the information printed on the front: They're ideal for rolling roaches. True, any unlaminated card can suffice, but apparently the cardboard in Camp's cards is the 'perfect consistency' for joints." If you find yourself in immediate need, Camp's office is directly above the 111 Minna art gallery in San Francisco. Smoke 'em if you've got 'em. (Photo via Technology Review)